Hi all, I was wondering wich models of FC came originaly with L.S.D.?!

 

Posted by Icemark:
Series 4 cars (86-88) that had LSD From the factory:
GXL w/manual trannys
T2
88 GTU
Optional on Sports

Series 5 cars with LSD from the factory:
89-90 GTUs
T2
a few 91 coupes had it as an option, but it is very rare.


__________________

 

How do you know if you have one or not? I used to really want to know, but now I'm putting in a 86 LSD so I really don't care if mine was one or not--it's just good to know.

 

It says LSD on the DIFF

pell out and see this (2 marks)
_______________
_______________

instead of this (1 mark)
_______________

 

thanks guys!

 

That doesnt always work. An open diff can leave two strips on pavement too.

What you really need to do is put the two wheels on different surfaces....Like Grass and Asphalt or Asphalt and Wet Asphalt. Thats when the LSD ( if you have one ) would actually work.

 

Jack up the rear of the car. Turn one wheel, if the other wheel turns in the same direction, you have an LSD.

If it turns the opposite way, its a standard diff.

 

Right on!

 

And that has been updated, that no Sports came with a Factory LSD optional or otherwise, and it turns out all 86-88 GXLs regardless of manual or auto tranny.

 

except for the fluid Vicouses LSD diffs, those need a little more to lock up, and often just turning them slowly will result in it acting like it is a open diff.

 

Thanks Icemark, wasn't aware of that.

 

So what if your LSD is worn out, 86-88. can you get it rebuilt? or is it better to buy a new one?

 

My car always leaves two marks, and as far as I know the car was stock when I got it, and its a cheap base model.

 

yeah its pretty easy to break both tires loose on the Base and Luxury models as they only had the tiny 14 inch tires.

Doesn't mean it has a LSD though... just means it doesn't have great traction.

 

i got an 88 gxl and what is good about lsd? is it better?

 

A lsd applies torque to both rear wheels, where as a open diff applies torque to only one wheel.

 

i have a sports model rx7 without a lsd i think
is it hard to put one in and is it expensive

 

It would be easiest to buy the entire rear differential with a LSD. I just got a 89GTUs rear diff (4.30 gears and viscous LSD) for $250. This is a desirable gear ratio, as to why it was that much. i will be selling my 4.1 Clutch-type LSD differential for about $125 or so. Its not all that difficult to install, just swap out the rear diffs. Could do it in a day if everything goes right.

 

Not exactly...

Depending on the type, a LSD can transfer all or a majority of the available power to the wheel with the most traction, or can lock so that both wheels get an equal amount when one or more wheels loose traction, or can partially equalize (maybe a 60/40) the distribution when at least one wheel looses traction for a period of time.

An open diff allows the wheel or wheels with the least traction to have the power. That is why if you have skinny tires or a light drive end that you can spin both drive wheels leaving twin tire marks even though there is no LSD. It simply because neither wheel has sufficent traction to propel the car correctly.

 

I was just trying to simplify the concept a bit.

 

Add more here. I just got a '91 which would have the viscous diff IF it has a limited slip. How can I test the diff with out running the car (it's broke) if the standard jack it up and spin the tires doesn't work on the viscous LSD? How fast would I have to spin the will to notice the drag from the LSD?

 

I just got a S5 diff, and I can turn the shaft that the driveshaft bolts to, and both output shafts will spin the same direction. This is just spinning by hand.

 

So would getting an LSD to add to my car wouldnt help traction on a launch?? How about with some better tires??

 

Better and wider tires will help, as will better shocks and sway bars.

 

Swaybars?? Really? So will an LSD help a base on a launch? I might get one here soon so Im a little curious.